Throttle-valve.



No. 835,014. PATENTED NOV. 6, 1906.

n T. C. DUNLAP.

THROTTLB VALVE.

APPLICATION FILED MAY 27, 1905.

lllII Tlwaamw, @.Dunmp,

Mraauofmup outer casing. This is bore vided for it.

. i Y'InsuTEn ,STATES-l PATENT OFFICE.

THADDEUS c. DUNLAP, oFQcoLUM-BUS, omo..

'rHno'TTpLE-VALVE..

T0 all whom tj may concern: Be itv known that I, THADnEUs C. DUNLAP a citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented certainnew and useful Improvements in Throttle-Valves4 for Fluid-Pressure Motors;.and I do hereby declare the following to bea full, clear, and exact descri tion of the invention, such as will enable otiiers skilled in the art to which it appertains to make and use the same.

he object of the invention is to provide a simple, effective, and easilymanipulated throttle-valve f or fluid-pressure motors, es

' ing tube--'o r valve-unseating device.

In the several views, 1 desi ates a pipe or internally to provide a chamber 1, into which fits the sliding tube or. valve-unseating device 2. The

casing 1 is also bored to provide a place for .the valve-seat 3.

4 designates the valve, which is of ball form and universally movable in the cavity pro- The iece constituting the valve-seat preferably as a very slightly concavedcavitous seat and is provided with 'a central orifice.

The sliding tube 2 is located on one side of the valve-seat, and the valve 4"is located on the o posite side; The slidin jtube 2 is rovide at its end next the va ve-seat Witha longitudinal projection 2, adapted to be drawn, as hereinafter described, through the central orifice of the valve-seat tocontact with the valve 4 and unseat the latter. The sliding tube 2 is also provided with a laterallyprojecting pin 2b, that extends through a straight slot 1,b in the outer casing 1. Placed externally on the casing or pipe 1 is a rotary sleeve 5, provided with a slot 5*, inclined to the direction of its rotation. The pin 2b on Specification of Letters Ilatent.4

f Application lodlly 27, 1905. Serial No. 262.676'.

Patented Nov. e, 190e.

the sliding tube 2 projects into 4the slot 5, so'

that by rotating t e sleeve 5 the tube 2 may be reciprocated to unseat the valve 4 from its seat 3 or ermit it to be seated by fluidpressure. vided at its right-hand end With a threaded coupling 6 forconneeting the device to a motor and at its left-hand end with a threaded cou ling for attaching the device to a source of uid-pressure.

In operation the valve 4 is seated by the fluid-'pressure as soon as the unseating device 2 is thrown-to the right, which is accomplished by-turning the sleeve 5 in one direction. By tu the sleeve 5 in the contrary direction t e projection 2 is drawn T e-outer pipe o1' casing 1'is prothrough the orifice in the valve-seat against the valve and the latter thus pushed oi its seat. a

Among-the advantages of this construction is that the contacting surface of the thereof made substantially uniform. What I claim, and desire to secure by Letters Patent, is I y 1. Ina throttle for fluid-pressure motors, `the combination of a pipe or casi a valveseat therein provided with an o ce, a slidin valve-unseatingv device located at one si e of the valve-seat and provided with a pro'ection to extend throu h the orifice in sai seat and a universal y-movable ballvalve on the opposite side of said valve-seat adapted to be unseated by said projection.

2. In a throttle for fluid-pressure motors, the 'combination of a pipe or casin a valveseat therein provided with an o ce, a universally-movable ball-valve within the caslvalve is constantly changing and thewear on one side of the valve-seat, a sliding m. tue within the casing on the opposite side of the valve-seat provided-with a longitudinal projection to extend through the valveseat to unseat the valve, a rotary sleeve on the exterior of thel casing provided with means to kengage the aforesaid sliding tube to' reciprocate the same to unseat the valve and permit the sameto be seated.

3. In a throttle for fluid-pressure motors, the combination of a casin a 4valve-seat therein, a universally-movab e ball-valve on loo sssm l to reciprocate it to unseet'thevalve and permit the Velve to be seated.

' In testimony whereof I aix my signature in presence of two Witnesses.

` THADDEUS C. DUNLAP.

Witnesses:

BENJ. FINCKEL,

OLEN J. Ross. 

